Per Rule 23 of the House Rules, committee members of the House of Representatives are selected by the caucus of each party.[1]
The chairs of the committees are selected by the majority party caucus.[1]
The standing committees of the house have the powers of subpoena, to administer oaths, and to issue commissions for the examination of witnesses.
[2]

(Please note: This is a general description of issue areas considered by committees; not a definitive or exhaustive listing. It is provided solely to assist the public in understanding the general roles of House committees.)[3][4]